v3.25.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2025
Jul. 30, 2025
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Securities Act File Number 000-19969  
Entity Registrant Name ARCBEST CORPORATION  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 71-0673405  
Entity Address, Address Line One 8401 McClure Drive  
Entity Address, City or Town Fort Smith  
Entity Address, State or Province AR  
Entity Address, Postal Zip Code 72916  
City Area Code 479  
Local Phone Number 785-6000  
Title of 12(b) Security Common Stock  
Trading Symbol ARCB  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   22,726,878
Entity Central Index Key 0000894405  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false